do local keys = {
    "rail-signal",
    "assembling-machine",
    "movement-bonus-equipment",
    "gui-style",
    "simple-entity",
    "fluid",
    "noise-layer",
    "explosion",
    "combat-robot",
    "repair-tool",
    "shortcut",
    "boiler",
    "virtual-signal",
    "heat-pipe",
    "inserter",
    "projectile",
    "furnace",
    "mouse-cursor",
    "beam",
    "lamp",
    "leaf-particle",
    "curved-rail",
    "utility-sounds",
    "resource-category",
    "constant-combinator",
    "equipment-category",
    "electric-energy-interface",
    "build-entity-achievement",
    "energy-shield-equipment",
    "construct-with-robots-achievement",
    "speech-bubble",
    "utility-sprites",
    "resource",
    "character",
    "straight-rail",
    "editor-controller",
    "electric-pole",
    "tree",
    "fluid-turret",
    "optimized-decorative",
    "equipment-grid",
    "active-defense-equipment",
    "tile-ghost",
    "programmable-speaker",
    "recipe-category",
    "achievement",
    "tutorial",
    "armor",
    "infinity-pipe",
    "entity-ghost",
    "locomotive",
    "night-vision-equipment",
    "market",
    "battery-equipment",
    "arrow",
    "train-stop",
    "character-corpse",
    "fluid-wagon",
    "wind-sound",
    "simple-entity-with-force",
    "underground-belt",
    "produce-achievement",
    "burner-generator",
    "generator",
    "simple-entity-with-owner",
    "ammo-turret",
    "sticker",
    "electric-turret",
    "deconstruct-with-robots-achievement",
    "combat-robot-count",
    "heat-interface",
    "item-request-proxy",
    "container",
    "dont-use-entity-in-energy-production-achievement",
    "construction-robot",
    "item",
    "player-damaged-achievement",
    "pump",
    "unit",
    "splitter",
    "custom-input",
    "artillery-flare",
    "wall",
    "map-settings",
    "utility-constants",
    "ammo",
    "player-port",
    "logistic-container",
    "deconstruction-item",
    "upgrade-item",
    "flame-thrower-explosion",
    "infinity-container",
    "unit-spawner",
    "technology",
    "turret",
    "trivial-smoke",
    "produce-per-hour-achievement",
    "accumulator",
    "trigger-target-type",
    "transport-belt",
    "item-entity",
    "artillery-turret",
    "train-path-achievement",
    "spidertron-remote",
    "cargo-wagon",
    "tips-and-tricks-item-category",
    "artillery-projectile",
    "smoke-with-trigger",
    "tile-effect",
    "tile",
    "stream",
    "logistic-robot",
    "dont-build-entity-achievement",
    "corpse",
    "tool",
    "item-subgroup",
    "module",
    "optimized-particle",
    "belt-immunity-equipment",
    "kill-achievement",
    "spectator-controller",
    "particle-source",
    "ammo-category",
    "solar-panel-equipment",
    "solar-panel",
    "tips-and-tricks-item",
    "smoke",
    "selection-tool",
    "loader-1x1",
    "rocket-silo-rocket-shadow",
    "rocket-silo-rocket",
    "cliff",
    "item-group",
    "rocket-silo",
    "offshore-pump",
    "pipe-to-ground",
    "damage-type",
    "ambient-sound",
    "roboport",
    "research-achievement",
    "recipe",
    "beacon",
    "blueprint-book",
    "reactor",
    "rail-remnants",
    "generator-equipment",
    "deconstructible-tile-proxy",
    "rail-planner",
    "rail-chain-signal",
    "radar",
    "arithmetic-combinator",
    "gate",
    "power-switch",
    "pipe",
    "deliver-by-robots-achievement",
    "roboport-equipment",
    "noise-expression",
    "highlight-box",
    "spider-leg",
    "fish",
    "mining-drill",
    "map-gen-presets",
    "storage-tank",
    "loader",
    "lab",
    "god-controller",
    "linked-container",
    "land-mine",
    "fire",
    "item-with-label",
    "item-with-inventory",
    "item-with-entity-data",
    "car",
    "capsule",
    "artillery-wagon",
    "spider-vehicle",
    "gun",
    "module-category",
    "sprite",
    "fuel-category",
    "font",
    "flying-text",
    "mining-tool",
    "item-with-tags",
    "finish-the-game-achievement",
    "dont-craft-manually-achievement",
    "particle",
    "decider-combinator",
    "group-attack-achievement",
    "autoplace-control",
    "copy-paste-tool",
    "blueprint"
}
return keys
end